
<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
          <!-- 角色列表 -->
          <el-table :data="rolesList" border stripe="stripe">
            <!-- 展开列 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-row
                  :class="['bdbottom', i1 == 0 ? 'bdtop' : '', 'vcenter']"
                  v-for="(item1, i1) in scope.row.children"
                  :key="item1.id"
                >
                  <!-- 渲染一级权限 -->
                  <el-col :span="5">
                    <el-tag
                      closable
                      @close="removeRightsById(scope.row, item1.id)"
                    >
                      {{ item1.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染二级和三级权限     -->
                  <el-col :span="19">
                    <el-row
                      :class="[i2 == 0 ? '' : 'bdtop', 'vcenter']"
                      v-for="(item2, i2) in item1.children"
                      :key="item2.id"
                      :span="6"
                    >
                      <el-col :span="6">
                        <el-tag
                          type="success"
                          closable
                          @close="removeRightsById(scope.row, item2.id)"
                        >
                          {{ item2.authName }}
                        </el-tag>
                        <i class="el-icon-caret-right"></i>
                      </el-col>
                      <el-col :span="18">
                        <el-tag
                          v-for="item3 in item2.children"
                          :key="item3.id"
                          type="warning"
                          closable
                          @close="removeRightsById(scope.row, item3.id)"
                        >
                          {{ item3.authName }}
                        </el-tag>
                      </el-col>
                    </el-row>
                  </el-col>
                </el-row>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"> </el-table-column>
            <el-table-column label="角色" prop="roleName"> </el-table-column>
            <el-table-column label="角色描述" prop="roleDesc">
            </el-table-column>
            <el-table-column label="操作" width="300px">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.id)"
                  >编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="deleteRoles(scope.row.id)"
                  >删除</el-button
                >
                <el-button
                  size="mini"
                  type="warning"
                  icon="el-icon-setting"
                  @click="showSetRightDialog(scope.row)"
                  >分配权限</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-col>
      </el-row>
    </el-card>
    <!-- 修改角色信息对话框 -->
    <el-dialog
      title="修改角色信息"
      :visible.sync="editFormVisiable"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editFormVisiable = false">取 消</el-button>
        <el-button type="primary" @click="editRolesInfo()">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRolesInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisiable"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisiable = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色的列表
      rolesList: [],
      // 查询到的角色信息对象
      editForm: {},
      // 角色信息更改预检验
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
        ],
      },
      //添加角色的信息
      addForm: {
        roleName: '',
        roleDesc: '',
      },
      //   添加角色的与验证
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
        ],
      },
      //修改角色信息对话框隐藏与否
      editFormVisiable: false,
      //添加角色信息对话框隐藏与否
      addDialogVisible: false,
      //控制分配权限对话框的显示于隐藏
      setRightDialogVisiable: false,
      //所有权限的数据
      rightsList: [],
      //树形控件中的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children',
      },
      //默认选中的节点id值数组
      defKeys: [],
      //当前即将分配权限的角色id
      roleId: '',
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    //获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status != 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolesList = res.data
      console.log(this.rolesList)
    },
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status != 200) {
        return this.$message.error('获取角色信息失败！')
      }
      this.editForm = res.data
      this.editFormVisiable = true
    },
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    async editRolesInfo() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc,
          }
        )
        if (res.meta.status != 200) {
          return this.$message.error('修改角色信息失败！')
        }

        this.editFormVisiable = false
        this.getRolesList()
        this.$message.success('修改角色信息成功！')
      })
    },
    async addRolesInfo() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post('roles', {
          roleName: this.addForm.roleName,
          roleDesc: this.addForm.roleDesc,
        })
        if (res.meta.status != 201) return this.$message.error('添加角色失败！')
        this.addDialogVisible = false
        this.getRolesList()
        this.$message.success('添加角色成功！')
      })
    },
    async deleteRoles(id) {
      // 弹框询问是否会删除数据
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      // 如果用户确认删除， 返回值是 confirm
      // 如果用户取消删除， 返回值是 cancel
      if (confirmResult != 'confirm') return this.$message.info('已取消删除')
      // console.log('确认删除')
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status != 200) return this.$message.error('删除角色失败')
      this.$message.success('删除角色成功！')
      this.getRolesList()
    },
    //根据id删除对应的权限
    async removeRightsById(role, rightId) {
      //弹框提示用户是否删除
      const confirmResults = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (confirmResults != 'confirm') {
        return this.$message.info('取消了删除！')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status != 200) return this.$message.error('删除失败')
      role.children = res.data
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      //获取权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status != 200) {
        return this.$message.error('获取权限列表失败！')
      }
      this.rightsList = res.data
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisiable = true
    },
    //通过递归，将当前角色所有三级权限的id存入defKeys数组
    getLeafKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach((item) => {
        this.getLeafKeys(item, arr)
      })
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        {
          rids: idStr,
        }
      )
      if (res.meta.status != 200) return this.$message.error('权限更新失败！')
      this.$message.success('权限更新成功！')
      this.getRolesList()
      this.setRightDialogVisiable = false
    },
  },
}
</script>


<style scoped lang= 'less'>
.el-tag {
  margin: 7px;
}
.bdbottom {
  border-bottom: 1px solid #ccc;
}
.bdtop {
  border-top: 1px solid #ccc;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>